A. made by adding carbon in steel
B. refined from cast iron
C. an alloy of iron and carbon with varying quantities of phosphorus and sulphur
D. extensively used for making cutting tools
E. extremely brittle
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite
A. carbon
B. sulphur
C. silicon
D. manganese
E. phosphorous
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
A. providing corrosion resistance
B. improving machining properties
C. providing high strength at elevated temperatures
D. raising the elastic limit
E. improving the resilience and ductility
A. 63 to 67% nickel and 30% copper
B. 88% copper, 10% tin and rest zinc
C. alloy of tin, lead and cadmium
D. iron scrap and zinc
E. none of the above
A. in which parts are not loaded
B. in which stress remains constant on in-creasing load
C. in which deformation tends to loosen the joint and produces a stress reduced
D. stress reduces on increasing load
E. none of the above